Partition Coefficients of Alloying Elements to Primary Austenite and Eutectic Phases of Chromium Irons for Rolls.

Abstract

The partition coefficients of chromium and carbon to primary austenite were measured on Fe-Cr-C ternary alloys containing 1.1 to 3.6masso/o C and I .5 to 26masso/o Cr. Each alloy specimen was heid for 1h at a temperature just below the liquidus and then quenched in water cooled copper mold. Partition coefficients were in the range of 0.53 to 0.80 for chromium and 0.25 to 0.38 for carbon, Partition coefficients of third elements to primary austenite were also evaluated on 5 and 1 5masso/o Cr quaternary alloys. The coefficients of silicon, nickel and copper were larger than unity and increased with an increase in carbon content, while those of molybdenum, manganese and vanadium were smaller than unity and decreased with increasing carbon content of alloy. The partition coefficient of chromium was little influenced by the third elements.